engleski

Estimation of airborne 106Ru activity concentration from total beta activity of PM10 particle fractions

ABSTRACT Airborne radioruthenium, as a result of an accidental release, presents a risk for occupational and public exposure. In fall 2017, a detection of 106Ru was reported by European atmospheric radioactive contamination monitoring networks. We investigated the daily specific total beta activity of PM10 particle fractions samples. The presented method enables indirect determination of airborne 106Ru activity concentration from total beta activity, in case 106Ru was confirmed as single excess radiological pollutant. This allows for daily measurements and time-resolved 106Ru activity concentration data. We estimated the indicative committed effective dose due to 106Ru inhalation for the Croatian population during the exposure period. Although the estimated dose value of up to 169.7 nSv, for up to 6 days duration of ruthenium air pollution, was very low, it was up to 40 times higher than the value for Hinh from inhalation of other radionuclides (90Sr+ 137Cs+ 40K +7Be).

accident ; ruthenium ; environmental release ; total beta activity ; PM10 particle fractions ; population exposure

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